BMW

BMW questions? Ask a BMW repair Expert for answers.

Ask an Expert,
Get an Answer ASAP!

BMW X5 4.4i 2002, ZF5HP24, Issue with a trans. Trans works…

Customer Question
BMW X5 4.4i 2002, ZF5HP24...
BMW X5 4.4i 2002, ZF5HP24, Issue with a trans.
Trans works fine when driving smoothly in D mode.
But in S mode, during aggressive accelerating trans goes to Fail Safe Mode.
There are two errors stored in EGS:
49 Symptom gear check
52 Gear Check 2
These two errors always appearing (after clearing) and
always in the same conditions, every time:
1) Gear was changed from 1->2 and when on 2 gear starting accelerating hard,
throttle opened more than 40% (60, 70, etc)
2) Gear was changed from 3->2 due to starting accelerating hard,
throttle opened more than 40% (60, 70, etc)From my point of view, trans should do a downshift in both conditions
and switch gear from 2->1.
I get logs from EGS and here is what I see:
Instead of that, engine rpm increasing, trans input speed increasing with
engine rpm, trans output speed not increasing or increasing slowly, wheels rpm
tied to output speed (car slows in accelerating). So, looks like TSS, OSS sensors are fine, cause in case of faulty OSS I guess wheels rpm will increase but output speed is not.
At some moment of time, a difference between trans input speed and output speed
become big enough and EGS detects slip/incorrect ratio and throws trans fail safe
with these two errors and gear goes to 3->4->5 and stucks, S mode not available.
After that I can stop, turn engine off, then immediatelly start again, trans fail safe
error on dash goes away, I can continue driving until the same conditions and
everything will be repeated again.
I checked out ZF documentation, and there is solenoid application chart,
and as I can see for 1 gear EDS1, EDS2, and EDS3 are used.
In EGS logs there are values for EDS solenoids in mA. When solenoid triggered,
value changed in range from 0 to 800mA (it closing or opening). EDS2 solenoid
should be used only for 1 gear (also for N, R, P, but for gears only for 1),
but for some reason, (in logs), looks like it's also triggered for other gears.
Maybe I'm wrong, but could faulty EDS2 prevent switching from 2->1 during hard
acceleration? Or maybe just trans hardware fault?This happens for last year. Trans fluid and filter are changed, new battery, no vacuum
leaks in engine, air mass meter is fine, tried exactly the same EGS unit from another car,
nothing helps so far.
Submitted: 9 months ago.Category: BMW
Show More
Show Less
Ask Your Own BMW Question
Customer reply replied 9 months ago
Just a bit more details: Cooling radiator and trans oil cooling thermostat where replaced, trans oil cooler was flushed.
Because a 7-8 months ago when the same happens, the trans temp was high, about 130C. Now it's not more than 100C.
Answered in 5 hours by:
11/16/2017
BMW Mechanic: Jason, BMW Technician replied 9 months ago
Jason
Jason, BMW Technician
Category: BMW
Satisfied Customers: 3
Experience: BMW Master Tech at BMW
Verified
Have you verified correct fluid type and level?
Ask Your Own BMW Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a bmw mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Jason Your Own Question
Jason
Jason
Jason, BMW Technician
Category: BMW
Satisfied Customers: 3
3 Satisfied Customers
Experience: BMW Master Tech at BMW

Jason is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

< Previous | Next >

Meet the Experts:

Roger

Roger

BMW Master Tech

3,050 satisfied customers

10 yrs. experience as BMW Master Technician, shop foreman and dealer.

Marty

Marty

ASE Certified Technician

559 satisfied customers

ASE & Bosch Certified Master Tech. Over 30 years experience.

bimmaster

bimmaster

BMW Technician

1,838 satisfied customers

3 years dealer experience, master bmw tech

Sam

Sam

BMW Master technician

1,043 satisfied customers

BMW S.T.E.P. graduate, 10 years BMW dealership experience

Thebmwbum

Thebmwbum

BMW Foreman

714 satisfied customers

31 years BMW Experience

mike

mike

BMW Technician

694 satisfied customers

bmw master tech ase certified

Matt

Matt

Engineer

447 satisfied customers

Mechanical Engineer with 20 years experience in the auto industry, 8 yrs in formula 1 engine testing

< Previous | Next >

Related BMW Questions
BMW 528i: Hello, I have a bit of a problem with my BMW e39.
Hello, I have a bit of a problem with my BMW e39. The ABS and DSC light keep coming on but only when I accelerate from a standstill. The initial checks when I start the car seem fine and all the light… read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
BMW 325i: 1994 BMW 325i has a dash warning light shaped like
1994 BMW 325i has a dash warning light shaped like a gear with an exclamation point inside. What system(s) are associated with this light and what causes it to come on? Possibly related to rough road,… read more
JayPutelis
JayPutelis
Associate Degree
565 satisfied customers
635csi:(NNN) NNN-NNNNsi Automatic3HP-22/H version transmission
1989 635csi Automatic 3HP-22/H version transmission I belive My car stays stays into 1st gear on {Economy Setting} My car stays between only 1-3 gears. Does not shift up past 3rd gear { 3-2-1 Setting}… read more
Thebmwbum
Thebmwbum
BMW Foreman
Vocational, Technical or Trade School
714 satisfied customers
BMW 330ci: Hi, I am having problems with my BMW 330ci. The
Hi, I am having problems with my BMW 330ci. The transmission goes into fail safe mode and random times when my foot is on the brake and drive is engaged. I know about the security bulletin and in resp… read more
bimmaster
bimmaster
BMW Technician
Vocational, Technical or Trade Scho
1,838 satisfied customers
735I: My 1996 e38..change gear..gear in d until 5000 rpm..manually
My 1996 E38 735I will not change gear in d until 5000 rpm. manually changing the gears 1 2 3 4 5 functions perfectly. Also not sure if this is connected my orange triangle light is glowing constantly.… read more
Thebmwbum
Thebmwbum
BMW Foreman
Vocational, Technical or Trade School
714 satisfied customers
BMW 328i i have a 99 bmw 328i with an a5s360r transmission
i have a 99 bmw 328i with an a5s360r transmission and it keeps going into limp mode. i pulled the codes the first time and got a p0720 and a p0740 code cleared them and came back with only the p0740. … read more
GEORGEBMW1
GEORGEBMW1
Auto Repair Shop Owner
Virgina Automotive Technical Instit
61 satisfied customers
BMW X3: a question, selected the trial period, gave my credit card
Yesterday is asked a question, selected the trial period, gave my credit card, and confirm that some money was removed from my visa card. But I have not received any answers to my questions. My questi… read more
MartinsMotorSport
MartinsMotorSport
Workshop Manager
Vocational, Technical or Trade Scho
21 satisfied customers
2004 525i: gas pedal..tach will jump a few hundred rpm then fall.
I have a 2004 525i with auto trans with 48K miles. When crusing at low speed (40-45mph) the car frequently experiences a series of momentary hestitations when the gas pedal is slowly depressed. The ta… read more
Anthony
Anthony
Master Automobile Technician
Vocational, Technical or Trade Scho
8,789 satisfied customers
2000 bmw 740i: sport..3dr 4th or 5th unless I..gears..slow down
I have a 2000 bmw 74oi sport and sometimes when my car heats up the transmission will not shift into 3dr 4th or 5th unless I am driving very fast then I can sometimes manuely shift it into the highr g… read more
jacob
jacob
Technician
Associate Degree
287 satisfied customers
98 740il: trans..car starts but slowww acceleration..under hood
I have a 98 740il and the trans fail safe is engaged from ignition and all error lights are on. car starts but slowww acceleration. I hear a click under hood right before errors come on.… read more
bimmaster
bimmaster
BMW Technician
Vocational, Technical or Trade Scho
1,838 satisfied customers
1998 BMW 528i: AT with electronic OD..000 original miles..per manual
1998 BMW 528i, 4-speed AT with electronic OD. Now 80,000 original miles on. All original stock including transmission and AT fluid, which is "lifetime" per manual. Problem: Overdrive not engaging sinc… read more
Tim West
Tim West
Service Manager
Computer/ Automotive certifications
16 satisfied customers
03 330i: fault codes..aftermarket..my tranny..control module
I have a '03 330i which i just installed an audio system to. I keep getting fault codes 59 & 65 ( aftermarket electromagnetic interference) which sets my tranny in fail safe mode. Any solutions w/ out… read more
Philly BMW Tech
Philly BMW Tech
BMW Master Technician
Vocational, Technical or Trade Scho
120 satisfied customers
325xi: 2002 fail safe mode 5th gear ratio incorrect code..reprogram
the car 325 xi 2002 fail safe mode 5th gear ratio incorrect code. replaced selenoid and reprogram. good for 1000 miles of driving , problem reoccured… read more
Steve
Steve
Bmw Technician
High School or GED
106 satisfied customers
The car engine was cool, reverse would work fine, once it got..trans
Transmission related issue: About 2 weeks ago, all of a sudden, my car began having problems with the reverse. While the car engine was cool, reverse would work fine, once it got to operating temperat… read more
peter van der veer
peter van der veer
mobile diagnostic specialist
ATA
150 satisfied customers
97 740 gl: a trans fail safe error..speed sensors..checked ok
I have a 97 740 il. Got a trans fail safe error. Checked both rear speed sensors and they checked ok. I get a po 720 error code from my obd 2 scanner. If I clear the code the car will take off fine, w… read more
mike
mike
BMW Technician
Associate Degree
694 satisfied customers
Hi I have a 2003 bmw x5 4.4L which has a problem with a transmission
Hi I have a 2003 bmw x5 4.4L which has a problem with a transmission safe mode kicking in and a code P0721 keeps coming out for the output speed sensor. gears seem to be kicked out of gear until highe… read more
Roger
Roger
BMW Master Tech
Bmw STEP Training
3,050 satisfied customers
BMW 530i: 40Mph..acceleration..it goes to trans fail safeprog
Hi, I have a BMW 530i 2002 Steptronic transmission. 90k miles trans luid changed 500miles ago and level checked 2 time = Ok. The problem is when I go from 0Mph to about 40Mph with normal acceleration … read more
Milli90
Milli90
Vocational, Technical or Trade Scho
58 satisfied customers
2000 528i: automatic trans..trans shifts..5th gear..4th
2000 528i e39 car automatic trans shifts to 5th gear then backshifts to 4th then fault mode carsoft egs code 55 speed monitor comes up is it the output sensor ??… read more
Adrian
Adrian
Shop Owner
Vocational, Technical or Trade Scho
32 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x